Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1996-04-05
1998-06-16
Epps, Georgia Y.
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 94, 369112, G11B 700
Patent
active
057682429
ABSTRACT:
An apparatus is disclosed for reading and/or writing information or to from an optical recording medium having a plurality of information storage layers. The apparatus includes a dynamic holographic optical element configured to focus light on the optical recording medium, a control circuit arranged to supply a drive signal to the holographic optical element, and a storage device in communication with the control circuit and storing at least a first drive signal and a second drive signal. The holographic optical element focusses light on a first one of the plurality of information storage layers when driven by the first drive signal on a second one of the plurality of information storage layers when driven by the second drive signal. An optical switch is also disclosed for connecting at least one light source in a source array to at least one light receiver in a receiver array. The switch includes a dynamic holographic optical element configured to receive light from the source array and to transmit light to the receiver array, a control circuit arranged to supply a drive signal to the holographic optical element, and a storage device in communication with the control circuit and storing at least a first drive signal and a second drive signal. The holographic optical element connects a first light source in the source array to a first light receiver in the receiver array when driven by the first drive signal and the holographic optical element connects the first light source with the first light receiver and a second light receiver when driven by the second drive signal.
REFERENCES:
patent: 3697149 (1972-10-01), Van Heeckeren et al.
patent: 4877297 (1989-10-01), Yeh
patent: 5075800 (1991-12-01), Hasman et al.
patent: 5119214 (1992-06-01), Nishii et al.
patent: 5148157 (1992-09-01), Florence
patent: 5194971 (1993-03-01), Haines
patent: 5199088 (1993-03-01), Magel
patent: 5237433 (1993-08-01), Haines et al.
patent: 5328853 (1994-07-01), Huber et al.
patent: 5361149 (1994-11-01), Hasegawa et al.
patent: 5379358 (1995-01-01), Blyler, Jr. et al.
patent: 5416618 (1995-05-01), Juday
patent: 5426521 (1995-06-01), Chen et al.
patent: 5523993 (1996-06-01), Freeman
patent: 5615186 (1997-03-01), Rosen et al.
patent: 5636190 (1997-06-01), Choi
Damman et al., "High efficiency in-line multiple imaging by means of multiple phase holograms", Opt. Comm.3, 312-315(1971).
Mait, "Understanding diffractive optic design in the scalar domain", JOSA vol. 12, #10, 2145-2158 (1995).
Zaleta et al., "Design methods for space-variant optical interconnections to achieve optimum power throughput", Appl. Opt. vol. 34, #14, 2436-2447 (1995).
Yamuzaki et al, "Holographic switch with a ferroelectric liquid-crystal spatial light modular for a large-scale switch", Appl. Opt. vol. 34, #35, 8137-8143 (1995).
Juday et al, Relaxation method of compensation in an opticcal correlator, Optical Engineering. vol 26, #11, 1094-1101 (1987).
Juday, "Optimal realizable filters and the minimum Euclidean distance principle", Appl. Opt. vol. 32, #26, 5100-5111 (Sep. 10, 1993).
Soutar et al. "Complex characterization of the Epson liquid crystal television", Proc. SPIE 1959, Orlando, (Apr. 1993).
Gerchberg et al, "A practical algorithm for the determination of phase from image and diffraction plane pictures", OPTIK vol. 35, #2, 237-246 (1972).
Kedmi et al, "Optimized holographic optical elements", JOSA-A vol. 3, #12, 2011-2017 (1986).
Abramowitz et al, Handbook of Mathematical Formulas, U. S. Dept. of Commerce, 7.sup.th printing, pp. 300-302 (1968).
Goodman, Introduction to Fourier Optics, McGraw-Hill, pp. vii, 30-75, New York (1968).
Barton et al, MEDOF: version 2.0, Proceeding of the SPIE, vol. 2490, Orlando, Apr. 1995.
Richard D. Juday, "HOLOMED--An algorithm for computer generated holograms," Proc. SPIE, v2752, Orlando, Apr. 1996.
Kanghua Lu, et al, "Theory and design of the liquid crystal TV as an optical spatial phase modulator," Optical Engineering, vol. 29 #3, Mar. 1990.
Gary Blough, et al, "Hybrid lenses offer high performance at low cost, " Laser Focus World, 67-72, 74, Nov. 1995.
Cate James M.
Chu Kim-Kwok
Epps Georgia Y.
The United States of America as representd by the Administrator
LandOfFree
Apparatus and method for focusing a light beam in a three-dimens does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for focusing a light beam in a three-dimens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for focusing a light beam in a three-dimens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1734486